Feature request: shortcut for "switch user" action

Currently is not possible to switch user using keyboard shortcuts. I wrote script for this task: https://discourse.gnome.org/t/gdm-how-to-switch-user-in-command-line/917/5?u=tomaszgasior and you can assign this script to custom shortcut but it may be good idea to provide this feature in Settings -> Details -> Keyboard shortcuts panel. I don't think we need default shortcut assigned although.

Currently it's only possible to assign shortcut for "log out" action which does not satisfy me since I often need to switch my user account without logging out current one.

Maybe you prefer to move this issue to g-s-d, I don't know. :)